Horseshoe Crab + Karametra's Favor Combos

3 known combos featuring both cards in Commander

Infinite colored mana Put most creature cards from your library onto the battlefield Infinite self-mill

Combo 1 with Kinnan, Bonder Prodigy

Results: Infinite colored mana · Put most creature cards from your library onto the battlefield
Steps
  1. Activate Horseshoe Crab by tapping it, adding {U}.
  2. Kinnan triggers, adding {U}.
  3. Activate Horseshoe Crab by paying {U}, untapping it.
  4. Repeat.

Combo 2 with Illusionist's Bracers

Results: Infinite colored mana
Show steps
  1. Activate Horseshoe Crab by tapping it, adding {U}.
  2. Activate Horseshoe Crab by paying {U}.
  3. Illusionist's Bracers triggers, copying Horseshoe Crab's ability.
  4. Resolve the copy of Horseshoe Crab's ability, untapping it.
  5. Activate Horseshoe Crab by tapping it, adding one mana of any color.
  6. Resolve Horseshoe Crab's ability from step 2, untapping it.
  7. Repeat.

Combo 3 with Mesmeric Orb

Also requires: Mesmeric Orb Mesmeric Orb
Results: Infinite self-mill
Show steps
  1. Activate Horseshoe Crab by tapping it, adding {U}.
  2. Activate Horseshoe Crab by paying {U}, untapping Horseshoe Crab.
  3. Mesmeric Orb triggers, causing you to mill a card.
  4. Repeat.
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